# Annulus Regions Interactive Graphics Mode

Annular Regions are used to define circular edge features. The annular region has an inner and outer radius, allowing you to define a circular edge feature while ignoring the center of the circle.

Annular Region Mouse Actions

| Controls | Description
--- | --- | ---
1 | Move | By placing the mouse cursor between the inner and outer radius, the mouse cursor icon will automatically transform, allowing you to drag the region anywhere within the image.
2 | Resize | By placing the mouse cursor over either the annular region's inner or outer radius, the mouse cursor icon will automatically transform, allowing you to drag either the inner or outer radius resize it (the inner and outer radius must be resized independently).

Annular Region Scan Direction

Annular regions scan for circular features from the inner radius to the outer radius.